lindsey graham took to twitter writing, "mr. president, don't think for one minute i don't hold you ultimately responsible for benghazi." and senator mccain took his rebuttal to the floor of the senate. >> we believe whoever it is must be held responsible, i say to the president of the united states, most importantly, the president of the united states who is commander in chief. who so far, in my view, has not exercised those responsibilities and also not informed the american people of the facts. >> s.e., senator mccain went on to say yesterday there was either gross incompetence here or, in fact, a white house cover-up. >> yeah. >> what do you think -- and we've asked senator mccain this directly -- what do you think he and others suspect in the matter? >> well, a couple things. i think it's a little bizarre. the indignation over questioning susan rice is a little bizarre given that she was made by the president's own admission the spokesperson on that day for what happened in benghazi. she was sent out to the sunday shows, fi